Snap-fastener clamp for sewing machines



July 10, 1923.

M. M CANN SNA I FASTENER CLAMP FOR SEWING MACHINES Filed July 15 1919 3 Sheets-Sheet 1 INVENTOR Czw- WITNESS.

ATTORNEY July 10, 1923. 1,461.42?

' M. M CANN SNAP FASTENER CLAMP FOR SEWING MACHINES Filed July 15 1919 3 Sheets-Sheet 2 WITNESS. INVENTOR ATTORNY W July 10, 1923.

M. M CANN SNAP FASTENER CLAMP- FOR SEWING MACHINES 5 Sheets-Sheet 5 -Filed July 15 1919 INVENTOR ATTORNEY WITNESS.

Patented July 10, 1923.

UNI

MICHAEL HOCANN, OF GLENMORBIS, NEW YORK, ASSIGNOR T0 FREDERICK OSANN COMPANY, or NEW YORK, n. Y.,

SNAP-FASTENER CLAMP Application filed July 15,

To all whom it may concern:

Be it known that I, MICHAEL MGCANN, a citizen of the United States of America, residing in Glenmorris, L. I., in the county of Queens and State of New York, have invented certain new and useful Improvements in a Snap-Fastener Clamp for Sewing Machines, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to sewing machine appliances to be used for holding snap fasteners while they are being sewed'to the cloth. The object of my invention is to provide a clamp adapted to hold a snap fastener in proper alignment with the needle and to make the necessary adjustment beneath the needle, and especially one which will hold the fastener close to the cloth to which it is being sewed and to and from which the fastener can be readily inserted and removed.

The nature of my improvements will be best understood as described in connection with the drawings in which- Figure 1 is a side elevation of a sewing machine equipped with my improved clamp here shown in side elevation and in the position in which it holds the fastener against the cloth.

Figure 2 is a front elevation of the machine as shown in Figure 1.

Figure 3 is a side elevation of the clamp, the lever to which it is attached, and the mechanism for opening the clamp in operation.

Figure 4 is a plan view of the clamp and the parts of the machine immediately associated with it.

Figure 5 is a plan view of the end of the positioning finger shown on a larger scale.

Figure 6 is a sectional view on the line 6-6 of Fig. 5, and

Figures 7 and 8 are plan views of devices used in adjusting the clamp holding mechanism.

A is the main frame of the machine having a flat top indicated at A, B, C and D are the usual standard, horizontal arm and head of a sewing machine, 1) indicating the lower side, of the head. E is a clamp holding slide having a flat bottom which rests on the flat top A and formed, as shown, with up wardly extending lugs E and E A CORPORATION OF NEW YORK.

FOR SEWING MACHINES.

1919. Serial No. 311,006.

E is a pin extending up from the slide E, and E and E are slots formed in it, as best shown in dotted lines in Fig. 4. .F is a flat finger extending out from the slide E, between which and a positioning finger of the clamp, to be described, the cloth is held. This tongue is held to the slide as indicated by the screws F F. G is a lever pivoted tothe ears E at G and having a rearwardly extending arm G which, as shown, is formed with a perforation at G H is a spring located between the arms E and pressing upward against the lever end G H, Fig. 1, is a spring actuated pin located in the perforation G3 of the lever G, and pressing against the standard B with the effect of giving the slide E, and parts attached to it, a tendency to move forward on the flat-top of the machine. I is the clamping finger of the snap fastener clamp. As shown, it is formed with slots I, I, and detachably se-' cured to the end of the lever G by screws I I passing through these slots; the outer end of the finger I is bent down outwardly, as indicated at 1*, and the finger roper, indicated at I, formed in the en of it. I is a perforation formed through the finger I, as shown, and I an upwardly extending stud firmly secured to it. J is the positioning finger of my clamp which is adapted to besecured to the clamping finger I in such a way that the clamping and positioning fingers will be resiliently pressed'toward each other. Conveniently, and as shown, the shank of the positioning finger can be made of s ring material and secured to the finger by a screw as indicated at J. The outer end ofthe positioning finger is sl0tted and formed with guide shoulders as indicated at J and from the bases of these shoulders extend ledges as indicated at J, J and J, upon which rest the edges of the snap fastener placed in the slot and held in position by the shoulders J These shoulders, as shown, preferably are formed with converging front portions as indicated at J K, Figs. 1 and 4, indicates a Snap fastener in position in the slot on the positioning finger and held in place by the clamping finger. L is a lock clamped-on the stud I and formed with a perforation L, through which, and the perforation I of the finger I, passes a rod, If, the lower end of which rests on the positioning finger while its upper end L is in position to come in contact with the under side D of the head D when the clamp is raised, as shown in Fig. 3. M is an arm clamped on the stud I and to the end of which is attached a chain M secured to a lever M on a rock shaft M from which extends another lever M to the outer end of which, as shown, is ivotally attached a rod M on which is c amped an elbow M from which depends a chain M which may pass to a treadle not shown. M is a spring acting to normally draw the lever M downward as shown in Fi 2. N indicates a bolt and Washer for holding the slide E on the face of the table, the bolt passing through the slot E which, as indicated, is much broader than the bolt, so as to give the necessary freedom of motion to the slide. 0 is a shaft extending through the body A of the machine, and to the upper projecting end of which is secured the sleeve 0, from which, as shown, extends a short arm and a longer arm 0 having a perforated end 0 which fits over the pin E of the slide E. To the short arm 0 is secured a slotted bar havin a slot 0 on its under side, as shown in igs. 1 and 2. P is a vertical shaft extending through the body of the machine and to the upper projecting end of which is secured the sleeve P, having extending out from its upper end the lever arm P slotted on its upper face as indicated at P The slotted levers O and P lie one above the other, as indicated, and a pin Q, clamped in place by a thumb screw Q, fits into both slots so that when the shaft P is oscillated an oscillating motion is given to the lever O, O and to the sleeve 0' and the lever arm 0; a backward and forward movement is given to the slide E and parts attached to it. R is a lever extending through the body of the machine and carrying at its end a curved link R slotted as indicated at R. S is a link adjustably connected at its end S with the slot E of the.

slide E as by means of a clamping bolt S. The other end of the link S is, by means'of the clamping bolt S having a head S fitting in the slot R of the link R, adjustably secured in said link, and obviously, by an oscillating movement of the shaft R a 1,; mama? some detail the familiar mechanism for,

shifting the slide and the clamp carried by it on the face of the machine and in relation to the needle.

I have indicated at T the ordinary needle bar of a machine and at T the needle carried by the bar. The mechanism for actuating the needle and the coacting mechanism for forming the stitch may be of any usual well known character.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a sewing machine a snap fastener positioning finger adapted to rest upon the cloth, and having a slotted end formed with guide shoulders to position the fastener, and ledges extending inward from the base of said shoulders to support the edges of the fastener, in combination with resilient means acting to press the positioning finger against the cloth, a clamping finger, resilient means acting to press the positioning and clamping fingers together, means for raising said fingers simultaneously from the cloth and means brought into operation by the raising of the fingers for separating them for the removal and insertion of fasteners.

2. In a sewing machine a clamp holding lever having a clamping fin r at its end, in combination with a posltionin fin r secured on the lower side of the c ampmg finger formed with a slotted end having shoulders to osition a fastener and inwardly exten ing ledges to support its edges, said fingers being pressed toward each other by resilient means, resilient means pressinglhe clamp holding lever toward the cloth, means for elevating said leverand the fingers carried by it at will, and means actuated by the raising of said lever to press apart the fingers.

MICHAEL MoCANN. 

